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K. V, RUDIN. m figyxilunow COUNTING MECHANISM FOR CALCULATING MACHINES.

APPLICATION FILED MAR. 25.1918.

Patented J ulyl, 1919.

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KARL VIKTOR RUBIN, 0F STOCKHOLM, SWEDEN.

REVOLUTION-COUNTING MECHANISM FOR CALCULATING-MACHINES.

Specification of Letters Patent.

Patented July 1, 1919.

Application filed March 26, 1918. Serial No. 224,821.

To all whom it may concern Be it known that I, KARL VIKTOR RUBIN correspondent, subject of the King of Sweden, residing at Karduansmakaregatan 12, Stockholm, Sweden, have invented certain new and useful Improvements in Revolution-Counting Mechanism of Calculating- Machines, of which the following is a specification.

My invention relates to computing or calculating machines and especially to the indicating mechanism in calculatin machines of the type in which numbers an items can be set up by means of (am disks revolubly mounted upon a shaft and provided with tongue-like fingers or handles. The disks have cam grooves into which project lateral extensions of the teeth which are slidably carried in setting disks fixedly mounted upon the same sha t as the cam disks. When the finger of any cam disk is moved a certain extent a correspondingly number of teeth will be caused to move radially outward so as to project from the circumference of the cam disk thus operated. When the main operating crank is turned, the teeth previously set up will then transmit to the counting mechanism through intermediate wheels, a movement corresponding in its ex tent to the numbers of teeth moved outward and projecting from the setting disk. Machines of this type are frequently furnished with an indicating mechanism or item register on which the set up numbers and items appear visible to the eye, the numbers and items being transferred to the indicating mechanism from the cam disks through intermediate wheels.

In the machines of this type, the indicating mechanism or the indicating wheels are mounted aside from the setting disks and the cam disks. This arrangement has the drawback that the height or the width of the machine will be proportionately large, whereby the handling or operating of the machine will be more difiicult.

It is the object of my invention to overcome this drawback by providing a device in which the indicating wheels rotatably mounted upon the setting disks are driven from the usual cam disks, and are arranged on the setting disks, in such manner that, while the wheels can be rotated during the setting and resetting of the cam disks they will, during the rotation of the setting disks, remain in the position to which they had been adjusted.

An embodiment taken as example is illustrated in the appended drawing which, in Figures 1 and 2 show in vertical section and from the front the parts in question of a calculating machine.

a is the ordinary setting disks the shiftable teeth of which (not shown) are, in a known way, shifted into the desired value with the help of the cam disk I) and the latters finger c.

For the purpose of getting this adjusted value to be visible on the revolution counting mechanism each of the indicating wheels cl is, in accordance with the present invention, rotatably journaled on its setting disk by means of a journal 0. On the wheel (Z which preferably extends beyond the periphery of the setting disk, there is made fast a gear wheel f which is in mesh with a toothed segment g, or the like, arranged on the cam disk. The said disk is provided with a recess h, so that it can be freely rotated without hindrance from the journal 6.

It is clear that the indicating wheel (Z on the cam disk 6 being rotated for the purpose of adjusting the value, must be engaged in consequence of the action of the pinion j, g, the adjusted value then becoming visible in the peep hole 2'.

As was mentioned above the indicating wheels project beyond the periphery of the setting disks, in order that the wheels shall be more easily visible through the peep holes 2'. In order that, in this operation. it shall be possible forthe indicating wheels to be freely rotated together with the setting disks, the Wheels must preferably run in the intermediate space between the known intermediate gear wheels la and the shoulder on the transferring member for the tens (not shown in the drawing) against which the curved surfaces of the setting disks act in order to reset the pawls into the position of rest. This intermediate space, however, is very small, and, in accordance with the present invention, for the purpose of increasing this space the arrangement is made that the said shoulders on the arms are made shorter and the curved surfaces on the setting disks moved to a corresponding degree beyond the periphery of the setting disks. These parts of the curved surfaces which are thus moved are visible at Z'in 1, one fort-each rota,- tion-direction.

The method of Working of the device is as follows.

Let it be supposed that the value 1917 is to be set. Thefour fingers a lying farthest to the right (Fig. 2) are then adjusted by hand and u e carried into their positions which correspond to the said value. During this adjustment the four indicating Wheels d which belon gtp the embodiment are rotated and gi re'fb'elow in the peep holes 5 the set value 1917. During the process of carrying out the calculating operations the indicating wheels remain in their adjusted position and are not reset to their zero position before the setting mechanism has also been reset to zero.

Iclaim: I

1. A calculating machine including a main shaft, a cam, and a settin disk rotatably mounted thereon, a gear unned upon the cam disk, the teeth of which project inwardly, such cam disk being further prosided with an arced slot below such gear, an indicating Wheel rotatably mounted upon a shaft secured to such setting disk, and a pinionmo-unted upon such latter shaft, such pinion enga in said gear.

2. A calcu atmg machine including a main shaft, a cam, and a setting disk rotatably mounted thereon, a gear formed upon the cam disk, the teeth of which project inwardly, such cam disk being further provided With an arced slot below such gear, an indicating wheelrotatably mounted upon a shaft, such shaft extending through said slot and being secured to such setting disk. and a pinion mounted upon such latter shaft, such pinion enga ing said gear.

In testimon Whereo I aflix my signature in presence 0 two witnesses.

KARL VIKTOL RUDIN.

\Vitnesses:

FRITZ E. HAREW, GRETA PLISER.

(Sepia o1 thiapatent may be obtained for five cents each, by addressing the Commissioner 0: Patents. Washington, 20.0. 

